What is Speed and Gear Matching?

[LaCarlos]

1st gear is used for starting; 2nd gear corresponds to a speed of 5-20km/h; 3rd gear corresponds to 20-40km/h; 4th gear corresponds to 40-60km/h; 5th gear corresponds to 60-100km/h, or the maximum speed. Relevant information about manual transmission cars is as follows: 1. Introduction: A car that uses a manual shift mechanical transmission (also known as manual transmission, MT) to adjust speed. That is, the gear shift lever must be manually moved to change the gear meshing position inside the transmission, thereby altering the gear ratio to achieve speed change. The gear shift lever can only be moved when the clutch is depressed. 2. Composition: Gear changes are achieved by switching different gear sets. As a key component for distributing power, the transmission must have two major parts: the power input shaft and the output shaft, plus the gears that make up the transmission, forming the most basic components of a manual transmission.

[AshleyDella]

I've been driving manual transmission cars for over a decade, and matching speed with the right gear is key to smooth driving. At different speeds, you need to shift to the appropriate gear: use first or second gear when starting or climbing hills, as the engine has more power and is less likely to stall; shift to third gear when cruising between 20 to 40 km/h on flat roads for steady acceleration; use fourth or fifth gear for highway speeds above 50 km/h, which saves fuel and keeps the ride quiet. Mismatching gears, like driving at low speeds in high gears, causes the engine to roar excessively, wasting fuel and accelerating wear. Once, on a long trip, I forgot to downshift and nearly broke down. Pay attention to the tachometer—keeping RPM between 1,500 and 3,000 is ideal. Learning basic rules helps develop good habits and extends your car's lifespan.

[DelAdrian]

When I first started learning manual transmission, I couldn't figure out how to match speed with gears. The instructor always said to listen to the engine sound: when it roars, it's time to shift up; when the sound gets lower, shift down. Once while driving in the city, I was still in second gear at 30 km/h, and the engine was unbearably loud. A friend yelled at me to quickly shift to third. From then on, I remembered: start in first gear up to about 15 km/h, second gear from 20 to 30 km/h, third gear from 30 to 50 km/h, and then shift to fourth and fifth for higher speeds. Beginners often make mistakes, like not downshifting in time when slowing down, which can suddenly stall the car and be dangerous. Now I'm practicing observing the speed and feeling the car's vibrations, and it's getting much better. Matching gears properly protects the car and makes driving more confident.

[DeMaggie]

The principle of matching speed and gear is actually not difficult. The engine has an optimal RPM range, typically between 1500 and 2500 RPM for maximum efficiency. Lower gears are used at low speeds with higher gear ratios to provide stronger torque, while higher gears are used at high speeds to reduce RPM and save fuel. For example, at a speed of 40 km/h, using third gear at 2000 RPM is just right; if second gear is used, the RPM might reach 3000, wasting fuel. When driving a manual transmission, I usually check the dashboard to shift gears, ensuring smooth acceleration. Automatic transmission cars are controlled by a computer, but aggressive throttle input from the driver can cause the RPM to spike. Understanding this matching can optimize driving and reduce unnecessary wear on components.